Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/103298
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Type: Journal article
Title: On the smallness of the cosmological constant
Author: Froggatt, C.
Nevzorov, R.
Nielsen, H.
Thomas, A.
Citation: Nuclear and Particle Physics Proceedings, 2016; 273-275:1465-1470
Publisher: Elsevier
Issue Date: 2016
ISSN: 2405-6014
1873-3832
Statement of
Responsibility: 
C. D. Froggatt, R. Nevzorov, H. B. Nielsen, A. W. Thomas
Abstract: In N=1supergravity the scalar potential of the hidden sector may have degenerate supersymmetric (SUSY) and non-supersymmetric Minkowski vacua. In this case local SUSY in the second supersymmetric Minkowski phase can be broken dynamically. Assuming that such a second phase and the phase associated with the physical vacuum are exactly degenerate, we estimate the value of the cosmological constant. We argue that the observed value of the dark energy density can be reproduced if in the second vacuum local SUSY breaking is induced by gaugino condensation at a scale which is just slightly lower than ΛQCD in the physical vacuum. The presence of a third degenerate vacuum, in which local SUSY and electroweak (EW) symmetry are broken near the Planck scale, may lead to small values of the quartic Higgs self-coupling and the corresponding beta function at the Planck scale in the phase in which we live.
Keywords: Supergravity; cosmological constant; Higgs boson
Rights: © 2015 Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
RMID: 0030049296
DOI: 10.1016/j.nuclphysbps.2015.09.237
Grant ID: http://purl.org/au-research/grants/arc/FL0992247
Appears in Collections:Physics publications

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